Use sof_da7219 to support max98390 on CML platform

[brentlu]

Currently we use bxt_da7219_max98357a machine driver to support following devices:

• da7219+max98357a on APL (SST)
• da7219+max98357a on GLK (SOF)
• da7219+max98357a on CML (SOF)
• da7219+max98390 on CML (SOF)

This PR will add the support of da7219+max98390 on CML to sof_da7219 machine driver and remove the corresponding code in bxt_da7219_max98357a.

Code tested on Samsung CML Chromebook.